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2006gmcdmax · 09-30-2016, 07:54 PM

The knob on the dash above the brake release is for the rear auxiliary heater that was dealer installed but still a GM part.

09-30-2016, 07:54 PM	#15
2006gmcdmax Registered User Join Date: Oct 2014 Location: St. Paul Minnesota Posts: 195	Re: New addition just arrived. The knob on the dash above the brake release is for the rear auxiliary heater that was dealer installed but still a GM part.